Al-Mahab AAS, Saeed RM. The Level of Conceptual Understanding of Functions and their Transformations and its Relationship with the Productive Motivation among Mathematics Students in the Faculty of Education University of Sana`a. JEPS [Internet]. 2023 May 29 [cited 2025 Dec. 20];7(17):156-72. Available from: https://www.ajsrp.ojsexpert.com/index.php/jeps/article/view/6413